Hypodermic needle mount



Oct. 22, 1940. s. J. EVERETT HYPODERMIC NEEDLE MOUNT Filed March 9, 1938 Patented Oct 22,- 1940 7 UNITED STATES PATENT OFFICE Application March '9, 1938, Serial No. 194,94-r

In Great Britain March 12, 1937 7 Claim said nipple. In contrast with a head of this nature, a mount is a relatively elongated body by 15 which a releasable connection is made to the syringe by the mount itself being interfitted with a nipple on the syringe. Known such mounts are formed with a slightly tapering bore or with an external taper whereby they are adapted for being releasably connected to the syringe by being forced over a conical nipple thereon or into a conical bore therein. Needles with such mounts are generaly discarded after a single use and a must therefore be inexpensive to produce. On the other hand, the needle proper must be firmly and strongly held in themount.

Pewter mounts cast upon the needles have the advantage that they can be made to facilitate the insertion through the mount of the wire which is generally introduced into the bore of theneedle. As hitherto practised, however, the process is slow and the further treatment of the mounts on the needles is expensive. If the mounts are produced apart from the needles, it

is difllcult to attach them securely by any commercially practicable process. It is an object of the invention to overcome such difficulties as these and at the same time to retain ease of ino sertion of the needle-wire.

According to tho invention, a mount for a hypodermic needle comprises a body of softmetal, adapted at one end for being secured to the end of a syringe and having at the other end 45 a nozzle-like formation provided with a needle bore, and a hard-metal re-inforcement, provided at that end of the said body which receives the needle proper, and surrounds the needle bore and blunt end of the needle. By this means, the

60 mount is strengthened where the needle is attached and the attachment is firmer than would be possible with the soft body alone. The re-inforcement may consist of a hard-metal cap, nipple, ring or tube embracing or embedded in the 55 aforesaid end of the soft body and may be produced in any appropriate fashion, as by pressing, turning, die-casting or moulding.

It has heretofore been proposed that a brass mount should be completely lined with a soft metal insert. In contrast to this proposal, the mount according to the invention is essentially a soft mount having only a. re-inforcement of hard metal at the end which receives the needle proper- Embodiments of the invention are illustrated by way of example in the accompanying drawing, in which:

Fig. 1 is a longitudinal axial section of a needle fitted with a mount.

Fig. 2 is a perspective view thereof.

Fig. 3 is a view similar to Fig. 1 of an alternative arrangement.

Fig. 4 is a longitudinal axial section of a needle fitted with another form of mount, and

Fig. 5 is a similar view showing an intermedi- 2o ate stage in the production of the mount of Fig. 4.

In the embodiment illustrated in Figs. 1 and 2, the needle proper I is secured in the tapering end-part 2 of a soft-metal mount-body 3. The body 3 has a deep, slightly tapering, bore 4 adapted for being secured over the nipple of a syringe, the bore of the needle I opening smoothly into the bore 4 by way of a flared part 5 facilitating insertion of a needle-wire through the mount.

A small hard-metal cap 6 pierced at I for the passage of the needle fits tightly over the reduced extremity of the end-part 2 of the soft-metal body. The said body may be made of pewter .and the cap 6 may be made of brass.

A method of producing the needle-assembly illustrated will now be described.

The mount-body 3 may be produced separately and is formed with a narrow borefor receiving the needle proper I. The latter is provided with a screw-thread at its blunt end and is screwed into the bore in the aforesaid body. The cap 6, produced by die-casting or stamping, is then secured over the extremity of the end-part 2 of the body 3 by being pressed or swaged, or screwed, thereon. By this means, the needle is secured considerably more tightly and permanently in the end-part 2 of the soft-metal and the said end-part is strengthened.

If desired, the re-inforcement may be first attached to the needle-proper and then secured to, for instance pressed into, the mount body. Thus, in the production of a needle-assembly similar to that illustrated in Figs. 1 and 2, the cap-part 6 may be first attached to the needle I and the ately surrounding the needle I.

cap and needle then engaged with the mount body 3 by compressing the cap-part 6 around the extremity of the latter. Or the engagement may be effected by forcing the mount-body into the cap-part. Or a needle with a hard-metal reinforcement attached to it may be introduced into the mount-body from the wide end and the re-inforcement pressed or forced into the bottom of the interior of the said body.

Various modifications may be made without departing from the invention. Thus a hardmetal re-inforcing ring may be employed in place of the cap-shaped part 6. Furthermore, instead of an external re-inforcement, a hard-metal insert may be embedded in the end-part 2 of the soft-metal body. For instance, a small brass or silver tube or nipple 8 such as is illustrated in Fig. 3 may be secured in the end-part 2 in the die-casting or stamping process by which the pewter mount is formed, and the needle I may be secured in the tube or nipple, without disturbing the mount itself, by means of a pewter slug 9 as illustrated, or by soldering, pressing or swaging the needle in the tube or nipple. To assist anchorage of the tube 8 in the mount, the tube may be of flared formation at the inner end III.

In the arrangement of Fig. 4, the re-inforcement consists of a hard-metal cap H which extends into and is embedded in the end-part 2 of a soft-metal mount-body 3, the flared edge I2 assisting in anchoring the cap in the mountbody. The needle I is embedded in a plug ii of soft-metal contained in the lower part of the cap II. An intermediate stage in a preferred mode of production is illustrated in Fig. 5 which shows the mount-body, including the plug l3, diecast upon and in the cap ll. As will be seen, there is surplus metal at ll which is forced into the formation shown in Fig. 4 when the mount is stamped upon the needle i inserted in the hole l5. As before, the needle is thus tightly secured in the strengthened end-part of the mount.

In accordance with another method, the mount body 3 is attached to the needle by die-casting a re-inforcement in the said body and immedi- The said body can then be made of a softer metal than would otherwise be possible, whereby the seating of the mount 'is rendered more pliable whilst strong attachment of the needle and the other aforesaid advantages are retained.

It is an advantage of the initially described methods that finishing operations can be performed upon the mount and, if desired, upon the re-inforcing part before attachment to the comparatively delicate needle. Thus, metal mounts and re-inforcing parts may be buffed and nickelplated without difiiculty.

The illustrated external form of the mountbody 3 is convenient for ease of manipulation of the needle, but other forms may be employed, if required.

I claim:

1. A hypodermic needle mount for syringes comprising a body part of relatively soft metal securable to the end of a syringe, said body part having a nozzle-like end provided with a needle bore, a hard metal end fitting securable to said nozzle-like end of the body part, and a needle having its blunt end fixedly secured within said hard metal end fitting with the hard metal fitting surrounding the needle bore and blunt end of the needle.

2. A hypodermic needle mount comprising a body part of relatively soft metal securable to the end of a syringe, said body part having a nozzle-like end provided with a needle bore, a hard metal end fitting embedded in said nozzlelike end of the body part, and a needle having its blunt end fixedly secured within said hard metal end fitting with said fitting surrounding the needle bore and blunt end of the needle.

3. A hypodermic needle mount comprising a body part of relatively soft metal securable to the end of a syringe, said body part having a nozzle-like end provided with a needle bore, and a hard metal, tubular reinforecement having one end portion embedded in said nozzle-like end of the body part, a needle having a plug surrounding its blunt end, the other end portion of said tubular reinforcement enclosing and engaging said plug and thus also surrounding the needle bore and the blunt end of the needle.

4. A hypodermic needle mount comprising a body part of relatively soft metal securable to the end of a syringe, said body part having a nozzle-like end provided with a needle bore, a hard metal end fitting embedded in said nozzlelike end of the body part, said end fitting being tubular and having an outwardly flared portion for assisting anchorage in the body part, and a needle having its blunt end fixedly secured within said hard metal end fitting with said fitting surrounding the needle bore and blunt end of the needle.

5. A hypodermic needle mount comprising a body part of relatively soft metal adapted at one end for attachment to a syringe and having at its other end a nozzle-like formation having a bore for the reception of a needle, a hard metal end fitting embedded and secured in the nozzlelike formation, said body part being pressed on the hard metal fitting, and a needle having its blunt end fixedly secured in said hard metal and fitting with said fitting surrounding the needle bore and blunt end of the needle.

6. In a hypodermic needle and mount, said mount comprising a body part of relatively soft metal adapted at one end for attachment to a syringe and having at its other end a nozzle-like formation provided with'a bore for the reception of the needle, a hard metal tubular reinforcement embedded in said nozzle-like formation and surrounding said bore, a plug-like body of soft metal within said reinforcement, the said needle having its blunt end secured within the said pluglike body of soft metal enclosed by said tubular reinforcement.

7. In a hypodermic needle and mount, said mount comprising a body part of relatively soft metal adapted at one end for attachment to a end of the needle being secured in said plug.

SAMUEL JAIVIES EVERETT. 

